This book 'The Joy of Health and Fitness' covers wellness attributes such as strength, agility, flexibility, vitality and cardiovascular health to enjoy life to the fullest extent. This book is organized in five parts. Part one describes structure and function of human body, genetics and environment interactions, set-point theory, ideal body weight and shape, and metabolic syndrome. Second part is devoted to aerobic and anaerobic exercises to achieve desired fitness level. In part three, human nutrition is explained in detail including antioxidants and glycemic index. Part four elaborates techniques of stress management using meditation, music, progressive muscle relaxation, hobbies, laughter and yoga. Finally, in the last part some serious diseases such as heart attack, strokes, diabetes, depression, and cancer are discussed in light of contemporary research findings and preventative measures are suggested